Of same place



W. W. WILLITS & A. 11.1111311311. GANOPY POR RAILWAY GAB. LAMPS. No.364,154. @A1611 May 31, 1887.

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'UNITED STATE-s PATENT OFFICE;

WARDW. wrLLrrs AND A'NfiuONvv DUBURN, or CHICAGO, iLLINOIs,

AssieNons rro THE ADAMS wssfrLAKD MANUrACrUmNC COMPANY OrA MICHIGAN, orsAM-E PLACE.

' CANOPY FoB'RAlLVl/A'Y-CAR LAMPS.

SPECIFICATION fomin'gprt of Letters Patent No. 364,154gdated May 31,1887.

Application filed December 27, 1886. Serial No. 222,623. (No model.)

To @ZZ whom t may concern-.-

Beit known that we, WARD W. WILLrrs and ANTHONY M. DUBURN, both ofChicago, inthe county of Cook and State of illinois, have inventedcertain new and usefulV Improvements in Canopies for Railway-Car Lamps,of which the following is a specification, reference being had to theaccompanying drawings and to the letters of reference marked thereon.

1o Our invention is designed more especially for use with a center lamphaving a burner which produces a powerful ilame of intense heat, theobject of the invention being to provide a canopy for such a lamp which-shall be thoroughly ventilated and cooled by the passage of air throughit, and which, in connection with the exterior ventilator, shall assistin the ventilation of the car.

In the accompanying drawings, Figure l is zo a perspective viewrepresenting our invention as applied to a car-roof, and also showingthe relation existing between the canopy and the lamp and exteriorventilator. Fig. 2 isa vertical longitudinal section through the canopy,2 5 car-roof, and exterior ventilator.

Similarletters of reference indicate like parts in the respectivefigures.

A represents the roof of the car, B the canopy, and C the exteriorventilator.

The top flange, a, of the rim or support B is secured to the car-roof,as show-n, and immediately below the flange a the' rim B is providedwitli a' series of'perforations, b. y

The canopy proper or lower bell, B, is constructed of an outer shell, c,and an inner shell,

c, a space, c?, being left between the twosbells. The inner shell, c',is swaged upon the upper part or neck, D, of the outer shell, c, atwhile the rim B is attached to the section D in any 4o suitable manner.The section D need not necessarily be integral with the outer shell.rlhe section D is provided at its upper end with holes e, whichcommunicate with the space c2 between the inner and outer shells. Thesec- 4 5 tion D is provided with a top flange or shoulder,

f, between which and the top edge of the inner shell, c', is swaged orotherwise attached the metallic chimney E, the lower part of whichregisters with the opening at the top of the in- 5o ner shell, c.

Referring to the exterior ventilator, C, G is a cylinder, the lowerflange, g, of which is secured to the roof A ofthe-car. Fis a taperedtube whichts over the top of the section D, and H is an outer hood orcap secured to the tube F by standards h. The upper part of the taperedtube F is provided with holes t'. -The canopy and ventilator being inplaee,as shown in 'the figures, the heat from the llame passes directlythrough the metallic chimney E, and

thence through the hood or cap H to the outer the canopy serves as aneffective ventilator.

The tapered tube F, fitting over the upper part of the section D, servesto eonne the heat within the eanopyand exterior ventilator, and preventit coming in contact with the woodwork of the car. there is no eommunication between the interior It willbe seen that while of the bellsand the wood-work, there is direct communication between the interior ofthe car and the ventilator through the openings b and between the canopyand the interior `of the ventilator through the openings e in the upperpart of the section D. t

Ve do not limit ourselves to the mode of connecting the parts of thecanopy and rim or support B', provided that such a construction beadopted as will produce a double or twoshell lower bell with passages,substantially as hereinbefore described; neither do we restrictourselves to the particular construction of eX- terior ventilator,provided it shall perform the functions hereinbefore ldescribed-that isto say, shall aid in excluding heat from the woodwork of the car andpermit a free escape of vitiated air from the car through openings in apart of the canopy or its support.

We are aware that it is not new to make the smoke-jack of a lamp ofconcentric tubes and to combine the same with the roof of a car and anouter ventilator, and such construction w,e broadly disclaim; but,

Having described our invention, what we claim is- 1. A canopy or lowerbell, B, consisting of the outershell, c, and the inner shell, c',united or swaged together, a space, c2, being formed between the shells,and the upper part of the Outer shell, c, being provided withperforations e, combined with the rim or support B, havl ing theperforations b, substanti ally as set forth. 2. The two-shell lowerbellor canopy, B, having the space c2 and perforations e, combined withthe ventilated rim or support B', the chi mney E, leading to theinterior of the inner shell of the canopy, and the tube F, forming withthe chimney E a space communicating by means of the perforations e withthe space c2, substantially as set forth.

3. Thetwoshell lower bell or canopy, B, hav-. ing the space c2 andperforations e, combined with the ventilated rim or support B', thechimney E, leading tothe interior of the inner shell of said canopy, thetube F, forming with the chimney E a space communicating by means of theperforations c with the space c, the cylinder G, surrounding that partof the tube F 2 5 which is exterior ofthe car, and the hood H,substantially as set forth.

In testimony whereof we hereunto set our hands and seals.

VARD W. WILLITS. [L. s.] ANTHONY M. DUBURN. [L. 5.] Vtnesses:

L. A. GRAY, JOHN S. BUTLER.

